Comprehensive analysis of Na balance. A: total fluid intake rate: two-way ANOVA diet P < 0.01, DOCA P < 0.01, diet × DOCA P < 0.01. B: total daily Na intake, including both fluid and food sources: two-way ANOVA diet P < 0.01, DOCA P < 0.01, diet × DOCA P = 0.68. C: apparent Na retention determined by subtracting urine Na from consumed Na: two-way ANOVA diet P < 0.01, DOCA P < 0.01, diet × DOCA P = 0.01. D: fecal Na elimination rate: two-way ANOVA diet P < 0.01, DOCA P < 0.01, diet × DOCA P = 0.04. E: fraction of daily Na intake that is eliminated to feces: two-way ANOVA diet P < 0.01, DOCA P < 0.01, diet × DOCA P = 0.69. F: calculated Na retention determined by subtracting urine and fecal Na from consumed Na: two-way ANOVA diet P = 0.85, DOCA P = 0.64, diet × DOCA P = 0.30. For A–F, n = 8 for all groups except n = 7 for 5L0D. For A–F, summary data are presented as means ± SE, and *P < 0.05 by Tukey’s multiple comparisons procedure. DOCA, deoxycorticosterone acetate.